<template>
  <el-container
    class="main-container">
    <!-- 头部区域 -->
    <el-header>
      <!-- 左侧的 logo -->
      <img
        src="../../assets/images/logo.png"
        alt="" />
      <!-- 右侧的菜单 -->
      <el-menu
        class="el-menu-top"
        mode="horizontal"
        background-color="#23262E"
        text-color="#fff"
        active-text-color="#409EFF">
        <el-submenu
          index="1">
          <template
            slot="title">
            <!-- 头像 -->
            <img
              :src="userinfo&&userinfo.user_pic?userinfo.user_pic:defaultAvatar"
              alt=""
              class="avatar" />
            <span>个人中心</span>
          </template>
          <el-menu-item
            index="1-1">
            <i
              class="el-icon-s-operation"></i>基本资料
          </el-menu-item>
          <el-menu-item
            index="1-2">
            <i
              class="el-icon-camera"></i>更换头像
          </el-menu-item>
          <el-menu-item
            index="1-3">
            <i
              class="el-icon-key"></i>重置密码
          </el-menu-item>
        </el-submenu>
        <el-menu-item
          index="2"
          @click="logout">
          <i
            class="el-icon-switch-button"></i>退出
        </el-menu-item>
      </el-menu>
    </el-header>
    <el-container>
      <!-- 侧边栏区域 -->
      <!-- 左侧边栏区域 -->
      <el-aside
        width="200px">
        <!-- 顶部用户信息 -->
        <div
          class="user-box">
          <img
            :src="userinfo.user_pic"
            v-if="userinfo.user_pic"
            alt="" />
          <img
            src="../../assets/logo.png"
            alt=""
            v-else />
          <span>欢迎
            {{ userinfo.nickname || userinfo.username}}</span>
        </div>
        <!-- 左侧菜单 -->
        <el-menu
          default-active="/home"
          class="el-menu-vertical-demo"
          background-color="#23262E"
          text-color="#fff"
          router
          active-text-color="#409EFF"
          unique-opened>
          <template
            v-for="(item,i) in menus">

            <!-- 不包含子菜单的“一级菜单” -->
            <el-menu-item
              :key="i"
              v-if="!item.children"
              :index="item.indexPath">
              <i
                :class="item.icon"></i>{{item.title}}
            </el-menu-item>
            <!-- 包含子菜单的“一级菜单” -->
            <el-submenu
              :key="i"
              v-else
              :index="item.indexPath">
              <template
                slot="title">
                <i
                  :class="item.icon"></i>
                <span>{{item.title}}</span>
              </template>
              <el-menu-item
                v-for="(menu,n) in item.children"
                :key="n"
                :index="menu.indexPath">
                <i
                  :class="menu.icon"></i>{{menu.title}}
              </el-menu-item>

            </el-submenu>

          </template>
        </el-menu>

      </el-aside>
      <el-container>
        <!-- 页面主体区域 -->
        <el-main>
          <router-view>
          </router-view>
        </el-main>
        <!-- 底部 footer 区域 -->
        <el-footer>©
          www.itheima.com
          - 黑马程序员
        </el-footer>
      </el-container>
    </el-container>
  </el-container>
</template>

<script>
import { mapState, mapActions } from 'vuex'
import defaultAvatar from '@/assets/logo.png'
export default {
  name: 'Home',
  data () {
    return {
      defaultAvatar,
      menus: []
    }
  },
  methods: {
    // 退出登录
    logout () {
      this.$confirm('确认退出登录?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        this.$router.push('/login')
        this.$store.commit('updateToken', '')
      }).catch(() => {
        this.$message.info('取消')
      })
    },
    // 初始化用户信息
    ...mapActions(['InitUserInfo']),
    async initMenus () {
      const res = await this.$http.get('/my/menus')
      if (res.data.code === 0) {
        this.menus = res.data.data
      }
    }
  },
  created () {
    if (this.token) {
      this.InitUserInfo()
      this.initMenus()
    } else {
      // 如果 token 没有值，就强制跳转到登录页面
      this.$router.push('/login')
    }
  },
  computed: {
    ...mapState(['userinfo', 'token'])
  }

}
</script>

<style lang="less" scoped>
.main-container {
  height: 100%;
  .el-header,
  .el-aside {
    .el-submenu,
    .el-menu-item {
      width: 200px;
      user-select: none;
    }
    background-color: #23262e;
  }
  .el-header {
    padding: 0;
    display: flex;
    justify-content: space-between;
  }
  .el-main {
    overflow-y: scroll;
    height: 0;
    background-color: #f2f2f2;
  }
  .el-footer {
    background-color: #eee;
    font-size: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
  }
}

.avatar {
  border-radius: 50%;
  width: 35px;
  height: 35px;
  background-color: #fff;
  margin-right: 10px;
  object-fit: cover;
}
// 左侧边栏用户信息区域
.user-box {
  height: 70px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-top: 1px solid #000;
  border-bottom: 1px solid #000;
  user-select: none;
  img {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background-color: #fff;
    margin-right: 15px;
    object-fit: cover;
  }
  span {
    color: white;
    font-size: 12px;
  }
}
</style>
